Cyanamide-Based Cyclization Reactions for Nitrogen-Containing Heterocycles Synthesis

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Materials Science

Background:

• Nitrogen-containing heterocycles are vital scaffolds in pharmaceuticals, pesticides, and natural products.
• Cyanamide, a dual-functional intermediate, is essential for synthesizing these heterocycles.
• Diverse synthetic applications of cyanamide are critical for drug development and new material design.

Purpose of the Study:

• To review the progress of cyanamide in synthesizing nitrogen-containing heterocyclic frameworks.
• To emphasize radical and non-radical synthetic pathways and their mechanisms.
• To reveal the potential applications of these compounds in various fields.

Main Methods:

• Summarization of cyanamide's role in synthesizing quinazoline, quinazolinone, and γ-lactams.
• Emphasis on radical and non-radical synthetic strategies.
• Explication of reaction mechanisms for diverse heterocyclic frameworks.

Main Results:

• Cyanamide enables the synthesis of polycyclic N-heterocyclic frameworks via radical pathways.
• Non-radical pathways using cyanamide yield a variety of nitrogen-containing heterocycles.
• The review covers cyanamide's application in synthesizing quinazoline, quinazolinone, and γ-lactams.

Conclusions:

• Cyanamide offers extensive and flexible applications in chemical synthesis.
• The reviewed methods support green chemistry and sustainable development goals.
• These advancements are expected to drive the development of efficient synthesis strategies for pharmaceuticals, agrochemicals, and materials.